Electric motor



(N0 ModeL) 3 Sheets-Sheet 1.

E. GRAY.

ELECTRIC MOTOR.

No. 452,429. Patented May 19,1891.

(No Model.) 3 SheetsSheet 2.

E. GRAY.

ELECTRIC MOTOR.

No. 452,429. Patented May 19,1891.

(No Model.) .3 SheetsSheet 3.

E. GRAY.

ELECTRIC MOTOR.

'No. 452,429. Patented May 19, 1891.

UNITED STATES PATENT OFFICE.

ELISI'IA GRAY, OF HIGHLAND PARK, ILLINOIS.

ELECTRIC MOTOR.

SPECIFICATION forming part of Letters Patent No. 452,429, dated May 19, 1891. Application filed July 3, 1888. Serial No. 278,895. (No model.)

To all whom it may concern.-

Be it known that I, ELISHA GRAY, a citizen of the United States, residing at Highland Park, county of Lake, and State of Illinois, have invented certain new and useful Improvements in Electric Motors, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to an electric motor which, although capable of general application, is especially adapted for use in connection with the receiving or reproducing pen of a telautograph' system, such as shown and described in my companion applications for Letters Patent filed May 31 and June 13, 1888,

Serial Nos. 275,593 and 276,921.

The motor constituting the present invention is constructed and organized to operate by means of impulses passing over an electric circuit, and is especially adapted for producing an interrupted or step-by-step movement, which may be either rotary or rectilinear and either continuously in one direction or reversible. The electric impulses for operating the motor are produced by makin and break ing or interrupting the current passing over an electric'eircuit, so as to successively energize and de-energize an electro magnet or magnets, and this may be effected by any suitable form of interrupter or circuit maker and breaker operated either by hand or mechanically or electrically.

As a full understanding of the invention can only be given by an illustration and a detailed description of a motor constructed and organized according to the invention, all f urther preliminary description will be omitted and a full description given, reference being had to the accompanyingdrawings, in which- Figure l is a side elevation of a rotary motor embodying the invention. Fig. 2 is an end elevation of the same, certain parts being broken away. Fig. 3 is a plan view of the same, partly in section. Fig. 4: is a plan view of a reciprocating motor embodying the invention. Fig. 5 is an end and Fig. (3 a side elevation of the same. Figs. 7 and 8 illustrate different forms of interrupters or circuit making and breaking devices. Figs. 9 and 1.0 are diagrams illustrating the electrical connections. These connections are shown in the diagrams'as applied to the reciprocating form of the motor; but the connections for the rotary form are exactly the same, and the description of the connections is therefore to be understood as applying to both forms.

Referring to Figs. 1, 2, and 3, it is to be understood that the motor consists, primarily, of a motor-magnet c, which is included in an electric circuit 2, (see Fig. 9,) which also includes an interrupter d, and is provided with an armature f, which is divided at its middle so as to form two parts, the adjacent ends of which act upon the driver a of the motor from which the motion is taken. The opposite or outer ends of the two parts of the armature are pivoted to swinging frame-pieces g in such manner that the two parts of the armature are capable of vibrating to and from the poles of the magnet, and also of moving laterally to and from the sides of the driver a. The two parts of the armature are provided with springs or other retractiles h, the tendency of which is to hold the parts in their withdrawn position away from both the magnet and the driver, the movement of the parts in these directions being limited by suitable backstops i. The retractiles h are so adjusted that whenever the magnet o is energized the two parts of the armature f will first be drawn toward each other, so as to grip the driver a between them, and will then be drawn toward the magnet, and thus impart a movement to the driver. It the motor is of the rotary form, as shown in Figs. 1, 2, and 3, the driver a will be in the form of a wheel, which may be mounted to turn on suitable bearings 11, as shown.

The operation of the motor thus organized is as follows: The circuit 2, beingsupplicd with suitable battery or other source of electricity, as indicated at it, and the interrupter (Z, which, as indicated in Fig. 9, is a simple key or push-button 17, being operated to close the circuit, the magnet 0 will be energized. As soon as the magnet is energized the two parts of the armature will be magnetized and will be drawn together, so as to grip the wheel a, and the energy of the mag net will then move the armature so as to move the wheel a step. As soon as the current over the circuit is interrupted by the action of the interrupter the magnet will be deenergizod and the parts of the armature will be restored is arranged to sweep over the face of a disk to their normal position by the springs or or plate 6, to which the other wire of the cirother retractiles h, and so the operation will cuit is connected, the face of the disk being 70 be repeated at each interruption of the curprovided with a series of slots or recesses 5 rent, andthe wheel will be rotated with astepwhich contain pieces of insulating material, by-step movement. The rapidity of the moveso that as the brush sweeps over the disk the ment of the Wheel will depend upon the frecircuit is repeatedly made and broken or inqueney of the interruptions in the current, terrupted, thus energizing and de-energizing 75 and by this means the speed of wheel and the motor-magnet in rapid succession.

[0 any part or parts driven thereby can be regu- Vhen the motor is of the reversible type, lated at pleasure. The retrograde movement it will frequently be desirable to energize and of the motor-wheel when it is released by the de-energize both of the motor-magnets by armature may be prevented by asuitable fricmeans of the same circuit and interrupter. 80 tion device, as m, arranged to act upon the One means for accomplishing this is illuswheel or its shaft. trated in Fig. 10. For this purpose the cir- If it is desired to make the motor reversicuit 2 includesboth of the motor-magnets c ble, it maybe providedwithasecond reverselyn, and also the magnet s of a polarized relay, arranged motor magnet a, similar to the the polarized armature of which is connected 85 magnet c, and having an armature 0, similar by a wire 8 to the circuit between the motorto the armature f, and arranged to act upon magnets and vibrates between contact-points the wheel (L to revolve it in the reverse direc- 9 10, which are respectively connected by tion. The magnet n may be included in a wires 12 13 to the circuit at a point beyond second electric circuit 8, having a similar the motor-magnets and at a point between 0 interrupter d for controlling the circuit. By the relay and the motor-magnets. The cir- 2 5 operating the interrupters of the respective cuit 2 is also provided with an ordinary polecircuits the motor can be reversed as he changer '6, which is connected to the termiquently as may be desired. nals of the battery 7; and to the circuit in the If it should be wished to organize the motor usual and well-known manner, so that as its 5 to produce a rectilinear instead of a rotary armature-lever is rocked by the energizing motion, the driver Cb may be developed or exand tie-energizing of its magnctr the polarity tended into the form of a rod and the motorof the current will be changed. The magnet magnets and armatures correspondingly ar- 0- is included in a local circuit '11, which also ranged, as shown in Figs. 4, 5, and G. In this includes a circuit maker and breakeru, which IOO case the operation will be exactlythe same, is operated in any suitable manner to change 3 5 except that the driver will be reciprocated in the condition of the circuit 14 whenever it is a reverse direction as the respective interdesired to operate the pole-changer and rerupters are operated. As shown in Figs. 4, verse the movement of the motor. As herein 5, and 6, each of the armatures is provided shown, the circuit maker and breaker 0011- 105 with three retractiles h g, one for drawing sists of an arm 15, which is included in the 40 the two parts-of the armatures away from the circuit and vibrates between stops, one of magnets and two for drawing the two parts which is also included in the circuit. The from each other. The springs h are conarm 15 is frictionally connected to the shaft nected to one part of each armature, and the 16, which carries the brush 5 in such manner I 10 other part is provided with a lip at, of nonthat so long as the shaft and brush continue magnetic material, which projects over the to move in one direction the arm will remain part to which the spring is connected, so that against one or the other of the stops and the the two parts move together. In this case condition of the local circuit 1i will remain the friction device at acts upon the rod a. In unchanged and the pole-changer will not act 1 15 this case, also, one of the armatures is shown to change the polarity of the current over the in the position which it will occupy when its circuit 2. As soon, however, as the movemagnet is energized. ment of the brush 5 is reversed the arm will The interrupter or means for making and be vibrated from one stop to the other, there breaking the electric circuit or circuits may by changing the condition of the circuit It 120 be any form of device which circumstances and operating the pole-changer to change may require and which will operate to make the polarity of the current over the circuit 2. and break or interrupt the current sufiiciently The relays is so arranged that so long as the to cause the magnets to operate. It may be current passing over the circuit is of one poa simple key or push-button 17, as indicated larity the polarized armature 7 will remain in 12; in Fig. 9, or may be a vibrator 18, which contact with one of its contact-points (10, for

50 swings to and from a contact-point or between example) and the current will pass through contact-points, as indicated in Fig. 7, or it the motor-magnet c and over the wire 8, armay be a so-called sunflower, constructed mature-1evcr '7, and wire 12,thereby short-cirto repeatedly interrupt the current by concuiting the motor-magnet u and energizing 13o tinned movement in the same direction, as and de-energizing the motor-magnet c as the shown in Fig. 8. Such an interrupter concircuit is made and interrupted by the intersists of a brush or contact-spring 5, to which rupter. As soon, however, as the polarity of one wire of the circuit is connected, and which the current over the circuit 2 is changed by the reversal ofthe brush 5 of the interrupter the armature-lever 7 of the relay will be vibrated into contact with the point 9, and the current over the circuit will pass over the wire 13, armature-lever 7, and wire 8 and through the motor-magnet 71, thereby short-circuiting the motor-magnet c and reversing the motor, and this action will take place as frequently as the movement of the brush 5 is reversed.

The interrupter or interrupter-s maybe operated in any suitable manner either by hand or electrically or mechanically, as circumstances and the use to which the motor is applied may require. If the interrupter is 0perated with sufficient rapidity, which may be readily done by the employment of electrical or mechanical devices for operating it, the successive steps of the motor may be taken in such quick succession as to make the movement of the motor in either direction practically continuous.

What I claim is- 1. The combination, with an electromagnet, of an armature for said magnet, made in two parts, each part being flexible at two points, so that the parts may move to and from each other and toand from the magnet, substantially as described.

2. The combination, with an electro-magnet, of an armature for said magnet, made in two parts, each part being flexible at two points, so that the parts may move to and from each other and to and from the magnet, and a driver acted on by said armature, substantially as described.

3. The combination, with an electric circuit including an electro-magnet and an interrupter, of an armature for said magnet, made in two parts mounted to move to and from each other and to and from the magnet, and a driver acted on by said armature, substantially as described.

4. The combination, with an electromagnet,of an armature for said magnet, made in two parts, each of said parts being mounted so that it may swing upon a swinging framepiece, whereby the said two parts may move to and from each other and to and from the magnet, substantially as set forth.

5. The combination, with two electro-magnets, of armatures for said magnets, each made in two parts mounted to move to and from each other and to and from their respective magnets, and a driver acted on in reverse directions by said armatures, substantially as described.

6. The combination, with an electric circuit including two electro-magnets, a polechanger, and a polarized relay connected to short-circuit one or the other of said magnets, according to the polarity of the current over the circuit, of armatures for said magnets, each made in two parts mounted to move to and from each other and to and from their respective magnets, and a driver acted on in reverse directions by said armatures, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

TELISHA GRAY. Witnesses:

DAVID M. ERSKINE, Jr, J. M. PoULToN. 

